EP0925595A1 - Wheeled circuit interrupter provided with a blower-attenuator - Google Patents

Wheeled circuit interrupter provided with a blower-attenuator

Info

Publication number
EP0925595A1
EP0925595A1 EP97910211A EP97910211A EP0925595A1 EP 0925595 A1 EP0925595 A1 EP 0925595A1 EP 97910211 A EP97910211 A EP 97910211A EP 97910211 A EP97910211 A EP 97910211A EP 0925595 A1 EP0925595 A1 EP 0925595A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
damper
arc quenching
attenuator
blower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97910211A
Other languages
German (de)
French (fr)
Other versions
EP0925595B1 (en
Inventor
Erhard Deylitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0925595A1 publication Critical patent/EP0925595A1/en
Application granted granted Critical
Publication of EP0925595B1 publication Critical patent/EP0925595B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/173—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal drawer type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a movably arranged circuit breaker with an arc quenching chamber and a blow-out damper which interacts with the arc quenching chamber for cooling and deionization from the arc quenching chamber when switching switching gases escaping, the blow-out damper being arranged in a stationary manner and a sealing surface interacting with a muzzle surface of the arc quenching chamber when the circuit breaker is moved owns.
  • a circuit breaker of this type has become known in two embodiments from DE 2 165 942 AI.
  • the circuit breaker can be moved in and out of the switchgear cell by a straight-line movement, the parting line between the arc quenching chamber and the
  • Blow-out damper is arranged at an angle to the direction of travel movement in order to achieve a wedge-like interaction.
  • the circuit breaker has an approximately cylindrical housing and can be inserted into the switchgear by a rotary movement. In the course of the rotary movement, the mouth surface of the arc quenching chamber and the sealing surface of the blowout damper come into engagement with one another.
  • the purpose of the blow-out damper mentioned is to influence the switching gases which occur when the circuit breaker is switched in such a way that they have electrically neutral properties and therefore no safety distance can be maintained between the mouth of the blow-off damper and live or earthed parts.
  • Arc quenching chamber is reliably engaged so that there is no leakage and switching gases can not escape at the joint between the arc quenching chamber and blowout damper. It is also necessary to ensure sufficient resistance to the pressure of the switching gases in order to be able to fully utilize the switching capacity of the circuit breaker.
  • the object of the invention is to improve the seal between the arc quenching chamber and the associated blowout damper.
  • blow-out damper has two telescopically guided partial bodies, of which one partial body is arranged in a stationary manner and the other partial body has the sealing surface.
  • the proposed design of the blowout damper ensures that the partial body of the blowout damper provided with the sealing surface is pressed against by the pressure of the switching gases Mouth surface of the arc quenching chamber pressed and thereby the seal is improved. Under certain circumstances, therefore, the use of sealing materials subject to wear between the mouth surface of the arc quenching chamber and the sealing surface of the blowout damper can be dispensed with.
  • Circuit breakers of the type considered here generally have an arc quenching chamber which is open at the top. Therefore, the exhaust damper is located above the
  • the proposed telescopic design of the blowout damper therefore leads to the fact that the part body provided with the sealing surface rests with its own weight on the mouth surface of the arc quenching chamber.
  • the resulting minimum value of the seal can be increased within the scope of the invention in that the partial body of the blowout damper provided with the sealing surface is biased against the arc quenching chamber by at least one spring.
  • Such a spring can also be arranged in telescopically interlocking sections of the partial bodies in order to protect the spring against the influence of the formwork gases.
  • FIG. 1 shows a mobile circuit breaker with a blow-out damper in a partially sectioned front view. The arrangement according to FIG. 1 is shown in FIG.
  • a circuit breaker 1 is movably arranged in a slide-in frame 2.
  • the circuit breaker 1 can assume a disconnected position, a test position and an operating position in the slide-in frame 2. From the representation of a travel drive, from guide means and
  • Disconnect contact arrangements are considered in the present context, since these elements are generally known and are described, for example, in DE 2 165 942 AI or DE 44 20 582 AI or DE 44 20 584 AI mentioned at the beginning.
  • the circuit breaker 1 with an attached exhaust damper 5 is shown on the right of a dash-dotted line, while on the left of the above-mentioned line the exhaust damper is omitted in order to make the mouth surfaces 4 of arc quenching chambers 3 visible.
  • the circuit breaker 1 is a three-pole low-voltage circuit breaker, the arc quenching chambers 3 of which are open at the top and have the mouth surfaces 4 there.
  • a blow-out damper 5 is arranged above the circuit breaker 1. This consists of two telescopically guided partial bodies 6 and 7, one partial body 6 being fastened to the insertion frame 2 by means of schematically indicated holding members 8. The other part 7 is guided in the fixed part 6 and has a sealing surface 10. In the known manner when retracting the
  • Circuit breaker 1 brought into its operating position within the slide-in frame 2, the mouth surfaces 4 of the arc quenching chambers 3 with the sealing surface 10.
  • the inner partial body 7 of the blowout damper 5 rests on the arc quenching chambers 3 under its own weight.
  • the switching gases from the arc quenching chambers 3 enter the blow-out damper 5, from which they are released to the environment in a cooled and deionized manner. Due to the telescopic guidance of the inner partial body 7 in the outer and fixedly supported partial body 6, the pressure of the switching gases increases the pressure force between the sealing surface 10 and the mouth surfaces 4.
  • two springs 11 are provided in the exemplary embodiment shown, which press the inner partial body 7 against the mouth surfaces 4.
  • the springs 11 are protected against a corrosive influence of the switching gases in that they are arranged in sections 12 and 13 of the partial bodies 6 and 7, which also cooperate telescopically. It depends on the size of the blowout damper 5 and its proportions whether it may be expedient to provide a larger or smaller number of springs 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

Disclosed is a wheeled circuit interrupter (1) provided with a blower-attenuator for cooling and deionizing a switching gas coming from an arc quenching chamber (3). The blower-attenuator (5) consists of two bodies (6, 7) telescopically fitting into each other, one (6) of which is stationary and the other has a tight surface (10) bearing against an outlet surface (4) of the arc quenching chamber (3). Owing to the two-piece design of the blower-attenuator, the tightness between said blower-attenuator and the arc quenching chambers (3) is improved by the gas pressure.

Description

Beschreibungdescription
Fahrbar angeordneter Leistungsschalter mit einem AusblasdämpferMobile circuit breaker with a blowout damper
Die Erfindung betrifft einen fahrbar angeordneten Leistungsschalter mit einer Lichtbogenlöschkammer und einem mit der Lichtbogenlöschkammer zusammenwirkenden Ausblasdämpfer zur Abkühlung und Entionisierung aus der Lichtbogenlöschkammer beim Schalten austretender Schaltgase, wobei der Ausblas- dämpfer ortsfest angeordnet ist und eine beim Verfahren des Leistungsschalters mit einer Mündungsfläche der Lichtbogenlöschkammer zusammenwirkende Dichtfläche besitzt.The invention relates to a movably arranged circuit breaker with an arc quenching chamber and a blow-out damper which interacts with the arc quenching chamber for cooling and deionization from the arc quenching chamber when switching switching gases escaping, the blow-out damper being arranged in a stationary manner and a sealing surface interacting with a muzzle surface of the arc quenching chamber when the circuit breaker is moved owns.
Ein Leistungsschalter dieser Art ist in zwei Ausfuhrungs- formen durch die DE 2 165 942 AI bekanntgeworden. Bei der einen Ausfuhrungsform ist vorgesehen, daß der Leistungsschalter durch eine geradlinige Fahrbewegung in die Zelle einer Schaltanlage einfahrbar und herausfahrbar ist, wobei die Teilfuge zwischen der Lichtbogenlöschkammer und demA circuit breaker of this type has become known in two embodiments from DE 2 165 942 AI. In one embodiment, it is provided that the circuit breaker can be moved in and out of the switchgear cell by a straight-line movement, the parting line between the arc quenching chamber and the
Ausblasdämpfer winklig zur Richtung der Fahrbewegung angeordnet ist, um ein keilartiges Zusammenwirken zu erzielen.Blow-out damper is arranged at an angle to the direction of travel movement in order to achieve a wedge-like interaction.
Bei der anderen der beiden erwähnten Ausfuhrungsformen besitzt der Leistungsschalter ein etwa zylindrisches Gehäuse und ist durch eine Drehbewegung in die Schaltanlage einsetz- bar. Im Verlauf der Drehbewegung gelangen die Mündungsfläche der Lichtbogenlöschkammer und die Dichtungsfläche des Ausblasdämpfers miteinander in Eingriff. Zweck des erwähnten Ausblasdämpfers ist es, die beim Schalten des Leistungsschalters auftretenden Schaltgase derart zu beeinflussen, daß sie elektrisch neutrale Eigenschaften aufweisen und daher zwischen der Mündung des Ausblasdämpfers und Spannungführenden oder geerdeten Teilen kein Sicherheitsabstand einzuhalten ist.In the other of the two embodiments mentioned, the circuit breaker has an approximately cylindrical housing and can be inserted into the switchgear by a rotary movement. In the course of the rotary movement, the mouth surface of the arc quenching chamber and the sealing surface of the blowout damper come into engagement with one another. The purpose of the blow-out damper mentioned is to influence the switching gases which occur when the circuit breaker is switched in such a way that they have electrically neutral properties and therefore no safety distance can be maintained between the mouth of the blow-off damper and live or earthed parts.
Für die gewünschte Wirkungsweise der beschriebenen Anordnung ist es wesentlich, daß beim Einfahren des Leistungsschalters in seine Betriebsstellung der Ausblasdämpfer mit derFor the desired mode of operation of the arrangement described, it is essential that when the circuit breaker is moved into its operating position, the blow-out damper with the
Lichtbogenlöschkammer zuverlässig in Eingriff gebracht wird, damit keine Undichtigkeit auftritt und somit Schaltgase nicht an der Teilfuge zwischen Lichtbogenlöschkammer und Ausblasdämpfers austreten können. Auch ist es erforderlich, für eine ausreichende Beständigkeit gegen den Druck der Schaltgase zu sorgen, um das Schaltvermögen des Leistungsschalters vollständig ausnutzen zu können.Arc quenching chamber is reliably engaged so that there is no leakage and switching gases can not escape at the joint between the arc quenching chamber and blowout damper. It is also necessary to ensure sufficient resistance to the pressure of the switching gases in order to be able to fully utilize the switching capacity of the circuit breaker.
Der Erfindung liegt hiervon ausgehend die Aufgabe zugrunde, die Abdichtung zwischen der Lichtbogenlöschkammer und dem zugeordneten Ausblasdämpfer zu verbessern.Proceeding from this, the object of the invention is to improve the seal between the arc quenching chamber and the associated blowout damper.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der Ausblasdämpfer zwei teleskopartig ineinandergreifend geführte Teilkorper aufweist, von denen der eine Teilkorper ortsfest angeordnet ist und der andere Teilkorper die Dichtfläche aufweist.This object is achieved according to the invention in that the blow-out damper has two telescopically guided partial bodies, of which one partial body is arranged in a stationary manner and the other partial body has the sealing surface.
Durch die vorgesehene Gestaltung des Ausblasdämpfers wird erreicht, daß der mit der Dichtfläche versehene Teilkorper des Ausblasdämpfers durch den Druck der Schaltgase gegen die Mündungsfläche der Lichtbogenlöschkammer gedrückt und hierdurch die Abdichtung verbessert wird. Unter Umständen kann daher von der Verwendung dem Verschleiß unterliegender Dicht- Werkstoffe zwischen der Mündungsfläche der Lichtbogenlόsch- kammer und der Dichtfläche des Ausblasdämpfers abgesehen werden.The proposed design of the blowout damper ensures that the partial body of the blowout damper provided with the sealing surface is pressed against by the pressure of the switching gases Mouth surface of the arc quenching chamber pressed and thereby the seal is improved. Under certain circumstances, therefore, the use of sealing materials subject to wear between the mouth surface of the arc quenching chamber and the sealing surface of the blowout damper can be dispensed with.
Leistungsschalter der hier betrachteten Bauart weisen im allgemeinen eine nach oben offene Lichtbogenlöschkammer auf. Daher befindet sich auch der Ausblasdämpfer oberhalb desCircuit breakers of the type considered here generally have an arc quenching chamber which is open at the top. Therefore, the exhaust damper is located above the
Leistungsschalters. Die vorgesehene teleskopartige Bauart des Ausblasdämpfers führt also dazu, daß der mit der Dichtfläche versehene Teilkorper mit seinem Eigengewicht auf der Mündungsfläche der Lichtbogenlöschkammer aufliegt. Der hierdurch gegebene Minimalwert der Abdichtung kann im Rahmen der Erfindung dadurch gesteigert werden, daß der mit der Dichtfläche versehene Teilkörper des Ausblasdämpfers durch wenigstens eine Feder gegen die Lichtbogenlöschkammer vorgespannt ist. Eine solche Feder kann in gleichfalls teles- kopartig ineinandergreifenden Abschnitten der Teilkorper angeordnet sein, um die Feder gegen den Einfluß der Schal - gase zu schützen.Circuit breaker. The proposed telescopic design of the blowout damper therefore leads to the fact that the part body provided with the sealing surface rests with its own weight on the mouth surface of the arc quenching chamber. The resulting minimum value of the seal can be increased within the scope of the invention in that the partial body of the blowout damper provided with the sealing surface is biased against the arc quenching chamber by at least one spring. Such a spring can also be arranged in telescopically interlocking sections of the partial bodies in order to protect the spring against the influence of the formwork gases.
Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.
Die Figur l zeigt einen fahrbar angeordneten Leistungs- schalter mit einem Ausblasdämpfer in einer teilweise geschnittenen Frontansich . Die Anordnung gemäß der Figur 1 ist in der Figur 2 in derFIG. 1 shows a mobile circuit breaker with a blow-out damper in a partially sectioned front view. The arrangement according to FIG. 1 is shown in FIG
Draufsicht gezeigt, und zwar links einer strichpunktierten Linie ohne Ausblasdämpfer.Top view shown, to the left of a dash-dotted line without blow-out damper.
Wie näher den Figuren 1 und 2 zu entnehmen ist, ist ein Leistungsschalter 1 in einem Einschubrahmen 2 fahrbar angeordnet. In bekannter Weise kann der Leistungsschalter 1 in dem Einschubrahmen 2 eine Trennstellung, eine Teststellung und eine Betriebsstellung einnehmen. Von der Darstellung eines Fahrantriebes, von Führungsmitteln undAs can be seen in more detail in FIGS. 1 and 2, a circuit breaker 1 is movably arranged in a slide-in frame 2. In a known manner, the circuit breaker 1 can assume a disconnected position, a test position and an operating position in the slide-in frame 2. From the representation of a travel drive, from guide means and
Trennkontaktanordnungen wird im vorliegenden Zusammenhang angesehen, da diese Elemente allgemein bekannt sind und beispielsweise in der eingangs erwähnten DE 2 165 942 AI bzw. der DE 44 20 582 AI oder DE 44 20 584 AI beschrieben sind. In der Figur 2 ist rechts einer strichpunktierten Linie der Leistungsschalter 1 mit einem aufgesetzten Auslasdämpfer 5 gezeigt, während links der genannten Linie der Ausblasdämpfer fortgelassen ist, um Mündungsflächen 4 von Lichtbogenlöschkammern 3 sichtbar zu machen.Disconnect contact arrangements are considered in the present context, since these elements are generally known and are described, for example, in DE 2 165 942 AI or DE 44 20 582 AI or DE 44 20 584 AI mentioned at the beginning. In FIG. 2, the circuit breaker 1 with an attached exhaust damper 5 is shown on the right of a dash-dotted line, while on the left of the above-mentioned line the exhaust damper is omitted in order to make the mouth surfaces 4 of arc quenching chambers 3 visible.
Der Leistungsschalter l ist in dem betrachteten Beispiel ein dreipoliger Niederspannungs-Leistungsschalter, dessen Lichtbogenlöschkammern 3 nach oben offen sind und dort die Mündungsflächen 4 aufweisen. Oberhalb des Leistungsschalters l ist ein Ausblasdämpfer 5 angeordnet. Dieser besteht aus zwei teleskopartig ineinandergreifend geführten Teilkörpern 6 und 7, wobei der eine Teilkorper 6 mittels schematisch angedeuteter Halteorgane 8 an dem Einschubrahmen 2 befestigt ist. Der andere Teilkorper 7 ist in dem ortsfesten Teilkorper 6 verschiebbar geführt und weist eine Dichtungsfläche 10 auf. In der an sich bekannten Weise werden beim Einfahren desIn the example under consideration, the circuit breaker 1 is a three-pole low-voltage circuit breaker, the arc quenching chambers 3 of which are open at the top and have the mouth surfaces 4 there. A blow-out damper 5 is arranged above the circuit breaker 1. This consists of two telescopically guided partial bodies 6 and 7, one partial body 6 being fastened to the insertion frame 2 by means of schematically indicated holding members 8. The other part 7 is guided in the fixed part 6 and has a sealing surface 10. In the known manner when retracting the
Leistungsschalters 1 in seine Betriebsstellung innerhalb des Einschubrahmens 2 die Mündungsflächen 4 der Lichtbogenlöschkammern 3 mit der Dichtfläche 10 in Eingriff gebracht. Dabei liegt der innere Teilkörper 7 des Ausblasdämpfers 5 unter seinem Eigengewicht auf den Lichtbogenlδschkammern 3 auf .Circuit breaker 1 brought into its operating position within the slide-in frame 2, the mouth surfaces 4 of the arc quenching chambers 3 with the sealing surface 10. The inner partial body 7 of the blowout damper 5 rests on the arc quenching chambers 3 under its own weight.
Beim Schalten des Leistungsschalters 1 treten die Schaltgase aus den Lichtbogenlδschkammern 3 in den Ausblasdämpfer 5 ein, aus dem sie abgekühlt und entionisiert an die Umgebung abgegeben werden. Aufgrund der teleskopartigen Führung des inneren Teilkorpers 7 in dem äußeren und ortsfest abgestutzen Teilkörper 6 bewirkt der Druck der Schaltgase eine Erhöhung der Andruckkraft zwischen der Dichtfläche 10 und den Mündungsflächen 4.When the circuit breaker 1 is switched, the switching gases from the arc quenching chambers 3 enter the blow-out damper 5, from which they are released to the environment in a cooled and deionized manner. Due to the telescopic guidance of the inner partial body 7 in the outer and fixedly supported partial body 6, the pressure of the switching gases increases the pressure force between the sealing surface 10 and the mouth surfaces 4.
Um die Dichtigkeit der beschriebenen Anordnung bereits im Ruhezustand zu verbessern, sind in dem gezeigten Aus- fuhrungsbeispiel zwei Federn 11 vorgesehen, die den inneren Teilkörper 7 gegen die Mündungsflächen 4 drücken. Die Federn 11 sind gegen einen korrosiven Einfluß der Schaltgase dadurch geschützt, daß sie in gleichfalls teleskopartig zusammenwirkenden Abschnitten 12 und 13 der Teilkörper 6 und 7 angeordnet sind. Von der Größe des Ausblasdämpfers 5 und seiner Proportionen hängt es ab, ob es zweckmäßig sein kann, eine größere oder kleinere Anzahl von Federn 11 vorzusehen. In order to improve the tightness of the described arrangement even in the idle state, two springs 11 are provided in the exemplary embodiment shown, which press the inner partial body 7 against the mouth surfaces 4. The springs 11 are protected against a corrosive influence of the switching gases in that they are arranged in sections 12 and 13 of the partial bodies 6 and 7, which also cooperate telescopically. It depends on the size of the blowout damper 5 and its proportions whether it may be expedient to provide a larger or smaller number of springs 11.

Claims

Patentansprüche claims
1. Fahrbar angeordneter Leistungsschalter (1) mit einer Lichtbogenlöschkammer (3) und einem mit der Lichtbogen- löschkammer (3) zusammenwirkenden Ausblasdämpfer (5) zur Abkühlung und Entionisierung aus der Lichtbogenlöschkammer (3) beim Schalten austretender Schaltgase, wobei der Ausblasdämpfer (5) ortsfest angeordnet ist und beim Verfahren des Leistungsschalters (1) mit einer Mündungsfläche (4) der Lichtbogenlöschkammer (3) zusammenwirkende Dichtfläche (10) besitzt, d a d u r c h g e k e n n z e i c h n e t , daß der Ausblasdämpfer (5) zwei teleskopartig ineinandergreifend geführte Teilkorper (6, 7) aufweist, von denen der eine Teilkörper (6) ortsfest angeordnet ist und der andere Teilkörper (7) die Dichtfläche (10) aufweist.1. Movable circuit breaker (1) with an arc extinguishing chamber (3) and with the arc extinguishing chamber (3) cooperating blowout damper (5) for cooling and deionization from the arc extinguishing chamber (3) when switching switching gases escaping, the blowout damper (5) is arranged in a stationary manner and, when the circuit breaker (1) is moved, has a sealing surface (10) which interacts with a mouth surface (4) of the arc quenching chamber (3), characterized in that the blow-out damper (5) has two parts (6, 7) which are guided in a telescoping manner, from which one part body (6) is arranged in a fixed position and the other part body (7) has the sealing surface (10).
2. Leistungsschalter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der mit der Dichtfläche (10) versehene Teilkorper (7) des2. Circuit breaker according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the with the sealing surface (10) provided partial body (7) of the
Ausblasdämpfers (5) durch wenigstens eine Feder (11) gegen die Lichtbogenlöschkammer (3) vorgespannt ist.Blow-out damper (5) is biased by at least one spring (11) against the arc quenching chamber (3).
3. Leistungsschalter nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß die Feder dl) in dem von den Teilkörpern (6, 7) umschlossenen Raum in gleichfalls teleskopartig ineinandergreifenden Abschnitten (12, 13) der Teilkorper (6, 7) angeordnet ist. 3. Circuit breaker according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the spring dl) is arranged in the space enclosed by the part bodies (6, 7) in also telescopically interlocking sections (12, 13) of the part body (6, 7).
EP97910211A 1996-09-16 1997-09-16 Wheeled circuit interrupter provided with a blower-attenuator Expired - Lifetime EP0925595B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19638948 1996-09-16
DE19638948A DE19638948A1 (en) 1996-09-16 1996-09-16 Mobile circuit breaker with a blowout damper
PCT/DE1997/002123 WO1998012721A1 (en) 1996-09-16 1997-09-16 Wheeled circuit interrupter provided with a blower-attenuator

Publications (2)

Publication Number Publication Date
EP0925595A1 true EP0925595A1 (en) 1999-06-30
EP0925595B1 EP0925595B1 (en) 2000-07-12

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EP97910211A Expired - Lifetime EP0925595B1 (en) 1996-09-16 1997-09-16 Wheeled circuit interrupter provided with a blower-attenuator

Country Status (5)

Country Link
US (1) US6100778A (en)
EP (1) EP0925595B1 (en)
JP (1) JP2000517464A (en)
DE (2) DE19638948A1 (en)
WO (1) WO1998012721A1 (en)

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Also Published As

Publication number Publication date
US6100778A (en) 2000-08-08
EP0925595B1 (en) 2000-07-12
DE19638948A1 (en) 1998-03-19
WO1998012721A1 (en) 1998-03-26
DE59702024D1 (en) 2000-08-17
JP2000517464A (en) 2000-12-26

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